1909089 has 60 divisors (see below), whose sum is σ = 3669204. Its totient is φ = 979776.

The previous prime is 1909087. The next prime is 1909091. The reversal of 1909089 is 9809091.

It is an interprime number because it is at equal distance from previous prime (1909087) and next prime (1909091).

It can be written as a sum of positive squares in 2 ways, for example, as 1016064 + 893025 = 1008^2 + 945^2 .

It is not a de Polignac number, because 1909089 - 2¹ = 1909087 is a prime.

It is a Curzon number.

1909089 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1909081) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 51579 + ... + 51615.

2^1909089 is an apocalyptic number.

It is an amenable number.

1909089 is a deficient number, since it is larger than the sum of its proper divisors (1760115).

1909089 is a wasteful number, since it uses less digits than its factorization.

1909089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76 (or 60 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 36.

The square root of 1909089 is about 1381.6978685661. The cubic root of 1909089 is about 124.0534152459.

The spelling of 1909089 in words is "one million, nine hundred nine thousand, eighty-nine".